Insulator Selection

1 Comparison of the performance of porcelain and glass suspension high voltage transmission line insulators 1.1 Evaluation of mechanical properties The mechanical tensile quality index Q and the mechanical residual tensile performance quality index Qs are important parameters for evaluating the mechanical properties of overhead power line insulators. In engineering design, the quality indexes corresponding to different types of tension insulator with 160, 210 and 300 kN are used.